treasures from the Wanchai market

 While perusing the market I came across a fruit that I had never seen before.  Actually, I have seen this before in the form of decorative bead work but never as an actual, edible object.  For HKG$15 per basket the price was right.  No one in my office knew what the fruit was but later in the evening my mainland friends knew exactly what the fruit was; they just didn't know the name.  Another friend thought that he had seen the fruit growing in a tree along the dragon's back.

SB thinks that it tastes like a tart strawberry.  I detect some plum also.  Does anyone out there know the name?